High-speed odor transduction and pulse tracking by insect olfactory receptor neurons

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2014
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Gerkin, Richard C.
Smith, Brian H.
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Proceedings of the National Academy of Sciences of the United States of America. 2014, 111(47), pp. 16925-16930. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.1412051111
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Sensory systems encode both the static quality of a stimulus (e.g., color or shape) and its kinetics (e.g., speed and direction). The limits with which stimulus kinetics can be resolved are well understood in vision, audition, and somatosensation. However, the maximum temporal resolution of olfactory systems has not been accurately determined. Here, we probe the limits of temporal resolution in insect olfaction by delivering high frequency odor pulses and measuring sensory responses in the antennae. We show that transduction times and pulse tracking capabilities of olfactory receptor neurons are faster than previously reported. Once an odorant arrives at the boundary layer of the antenna, odor transduction can occur within less than 2 ms and fluctuating odor stimuli can be resolved at frequencies more than 100 Hz. Thus, insect olfactory receptor neurons can track stimuli of very short duration, as occur when their antennae encounter narrow filaments in an odor plume. These results provide a new upper bound to the kinetics of odor tracking in insect olfactory receptor neurons and to the latency of initial transduction events in olfaction.

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ISO 690SZYSZKA, Paul, Richard C. GERKIN, C. Giovanni GALIZIA, Brian H. SMITH, 2014. High-speed odor transduction and pulse tracking by insect olfactory receptor neurons. In: Proceedings of the National Academy of Sciences of the United States of America. 2014, 111(47), pp. 16925-16930. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.1412051111
BibTex
@article{Szyszka2014Highs-30099,
  year={2014},
  doi={10.1073/pnas.1412051111},
  title={High-speed odor transduction and pulse tracking by insect olfactory receptor neurons},
  number={47},
  volume={111},
  issn={0027-8424},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  pages={16925--16930},
  author={Szyszka, Paul and Gerkin, Richard C. and Galizia, C. Giovanni and Smith, Brian H.}
}
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